# Long Exposure Calculator vs NDTimer

The clearest difference is price: Long Exposure Calculator at Free against NDTimer's $1.99. Long Exposure Calculator also leads on iOS requirement (12.0 vs 14.2). NDTimer's advantage is in-app purchases (none vs 6) and ads (none vs shown). On device support there is nothing between them.

Long Exposure Calculator is free to download; NDTimer costs $1.99 up front. Long Exposure Calculator sells 6 one-off in-app purchases. NDTimer asks for nothing beyond the download.

Long Exposure Calculator ships an update every 19 months, NDTimer every 3 months. The most recent releases landed on October 21, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Long Exposure Calculator | NDTimer |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.4 (64 ratings)](https://appshunter.io/ios/app/long-exposure-calculator/id694553269/reviews)** | — |
| Number of ratings | **64** | — |
| Positive reviews | 81.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | — | **#132** |
| Size | 24 MB | 1 MB |
| Requires iOS | **12.0** | 14.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Junel Corales](https://appshunter.io/developer/694553272) | [Tim Kloess](https://appshunter.io/developer/1680704375) |

## What reviewers say

### Long Exposure Calculator

[App page](https://appshunter.io/ios/app/long-exposure-calculator/id694553269)

Calculate precise exposure times for long-exposure photography with Neutral Density filters. Features a countdown timer for exposures over 10 seconds and supports up to 24 stops of ND filtration.

**Highlights:** ND filter exposure calculation, Countdown timer, Supports up to 24-stop ND filters, Simple to use

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Leave a Tip | $1.99 | one-time |
| Leave a Tip | $2.99 | one-time |
| Leave a Tip | $3.99 | one-time |
| Leave a Tip | $5.99 | one-time |
| Leave a Tip | $9.99 | one-time |
| Leave a tip | $14.99 | one-time |

**What reviewers like**

- 👍 Simple and intuitive interface
- 🚀 Fast and efficient calculations
- ✅ Accurate results
- 💡 Versatile ND filter notation options
- 🎨 Offers light and dark color schemes

**What reviewers complain about**

- ⚠️ Ads can be intrusive and accidentally tappable
- 🤔 Some users confused by filter notation settings
- 🚫 Does not factor in aperture
- ⏳ Timer only starts from 30 seconds
- ❌ App freezes or crashes after use/updates

**Reported bugs**

- App freezes after each use
- App crashes after update
- App freezes and needs to be closed and reopened
- App runs no more after iOS update
- App crashes and cannot be opened again

**Requested features**

- Filter bag feature to select owned filters
- Ability to edit existing filters for precise values
- Combine multiple filters in calculations
- Option to display calculated time in seconds only
- Acoustic signal/alarm at the end of the timer


### NDTimer

[App page](https://appshunter.io/ios/app/ndtimer-long-exposure/id6447485150)

**Currently charting:** #132 Top Paid · Photo & Video (US App Store)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Long Exposure Calculator free?

Long Exposure Calculator is free to download, with in-app purchases available.

### Is NDTimer free?

NDTimer costs $1.99, with no in-app purchases.

### Do Long Exposure Calculator or NDTimer have ads?

Long Exposure Calculator shows ads; NDTimer does not.

### Which is updated more often, Long Exposure Calculator or NDTimer?

Long Exposure Calculator ships an update every 19 months, and NDTimer every 3 months. Most recently, Long Exposure Calculator was updated on October 21, 2026 and NDTimer on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*